Peel the tangerines and blend them in a mixer.

In a pot, combine tangerines, sugar, and lemon juice. Boil on high heat briefly, then simmer on medium-low heat until thickened.

Trim the crusts off the bread and flatten each slice with a rolling pin.

Spread tangerine jam on the bread, brush egg wash on the edges, and fold into a triangle. Seal the edges using a fork.